Neat Idea but the best I found was a blue tooth loader that uses an android phone with an app to load games. They have this on the A8 an it is great. PC wirh internet to load a game sounds neat but not convenient.

Check out this thread with mentions about the Toshiba FlashAir WiFi card:

The hardware is not difficult, because basically I did this already with my Kerberos cartridge for the C64 and the Crazy Cartridge prototypes. But the software will be more work, because I plan to integrate flashing over a web interface, and a web browser on the Atari 2600 would be fun, or the ability to download and start cartridge images over the internet.